| The length of a room is 8 feet more than twice the width. If takes 124 feet of fencing to go around the perimeter of the room, what are its dimensions. |
Find LENGTH Find WIDTH Let P=PERIMETER Let L=LENGTH Let W=WIDTH Given L=2W+8 Given P=124 Given P=2L+2W 124=2L+2W // Substitute 124 for P in P=2L+2W 124=2(2W+8)+2W Comment: Substitute 2W+8 for L in 124=2L+2W 124=4W+16+2W 0=6W-108 Step W=18 Comment Simplify Solution W=18 // L=44 Solution L=44 Substitute W=18 into L=2W+8 End |